On 14/08/2014 03:08, Ben Finney wrote:
luofeiyu <elearn2...@gmail.com> writes:
help(int.__init__)
Help on wrapper_descriptor:
__init__(self, /, *args, **kwargs)
Initialize self. See help(type(self)) for accurate signature.
what is the "/" mean in __init__(self, /, *args, **kwargs) ?
I don't know, I haven't seen that before. It is confusing.
At least it is acknowledged (“See [elsewhere] for accurate signature”)
to be unhelpful.
I suspect this is an artefact of the impedance mismatch between Python
function signatures and the implementation of ‘int’ in C code. The “/”
may be a placeholder for something the C implementation requires but
that Python's function signature expectation doesn't allow.
Perhaps Python 3's keyword-only arguments may one day help functions
like that get implemented with a more useful signature, but I'm not
holding my breath for that.
Something to do with the Argement Clinic
http://legacy.python.org/dev/peps/pep-0436/ ???
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what you can do for our language.
Mark Lawrence
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